861327945 has 32 divisors (see below), whose sum is σ = 1532649600. Its totient is φ = 458955072.

The previous prime is 861327913. The next prime is 861327983. The reversal of 861327945 is 549723168.

861327945 is a `hidden beast` number, since 8 + 613 + 27 + 9 + 4 + 5 = 666.

861327945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861327945 - 2⁵ = 861327913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 861327945.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194779 + ... + 199151.

It is an arithmetic number, because the mean of its divisors is an integer number (47895300).

Almost surely, 2^861327945 is an apocalyptic number.

It is an amenable number.

861327945 is a deficient number, since it is larger than the sum of its proper divisors (671321655).

861327945 is a wasteful number, since it uses less digits than its factorization.

861327945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5846 (or 5840 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 861327945 is about 29348.3891380771. The cubic root of 861327945 is about 951.4577600991.

The spelling of 861327945 in words is "eight hundred sixty-one million, three hundred twenty-seven thousand, nine hundred forty-five".